I’ve been watching some people on here claim they built entire RAG systems without touching any code, and I’m genuinely skeptical but also curious if it’s actually possible.
I started with Latenode’s no-code builder and got pretty far. Dragged blocks around for retrieval, set up the vector store connection, wired in a generation model. All visual, all blocks. The copilot actually did turn my plain English description into a working workflow that I barely had to adjust.
But then I hit some edge cases. My knowledge base had inconsistent formatting in places, and I wanted to do some custom ranking logic before generation. That’s where I wondered if I needed to drop into JavaScript instead of staying purely visual.
My question is: how much of a real RAG system can you actually build staying 100% in the no-code visual space? Are people who claim they never touched code actually staying pure, or are they just doing one or two small code blocks for edge cases and calling it “no code”?
You can build production RAG workflows almost entirely in the visual builder. The honest answer is that edge cases might push you to a code block, but that’s normal in any platform.
The value isn’t that you never write code. It’s that you don’t need to write the scaffolding. The thing that took weeks before—setting up vector stores, handling API keys, orchestrating retrieval and generation—that’s all visual now.
For custom ranking or data transformation, a single JavaScript block fits before your generator. That’s pragmatic, not cheating.
Latenode’s philosophy is low-code with optional code, not “no code at any cost.”
I’d say you can build 80-90% purely visual, and that covers most use cases. Where code becomes practical is when you’re doing domain-specific logic that the generic blocks don’t anticipate.
For instance, I needed to deduplicate retrieved results and filter by recency. Both of those would’ve been painful with just visual blocks, but a small JavaScript function handled it cleanly. Still way faster than building the whole pipeline in code from scratch.